package com.ruoyi.gateway.filter;
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import javax.annotation.Resource;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.cloud.gateway.filter.GatewayFilterChain;
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import org.springframework.cloud.gateway.filter.GlobalFilter;
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import org.springframework.core.Ordered;
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import org.springframework.core.io.buffer.DataBufferFactory;
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import org.springframework.data.redis.core.ValueOperations;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import org.springframework.http.server.reactive.ServerHttpResponse;
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import org.springframework.stereotype.Component;
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import org.springframework.web.server.ServerWebExchange;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONObject;
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import com.ruoyi.common.core.constant.CacheConstants;
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import com.ruoyi.common.core.constant.Constants;
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import com.ruoyi.common.core.domain.R;
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import com.ruoyi.common.core.utils.StringUtils;
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import com.ruoyi.common.redis.service.RedisService;
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import com.ruoyi.gateway.config.properties.IgnoreWhiteProperties;
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import reactor.core.publisher.Mono;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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/**
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* 网关鉴权
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*
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* @author ruoyi
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*/
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@Component
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public class AuthFilter implements GlobalFilter, Ordered
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{
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private static final Logger log = LoggerFactory.getLogger(AuthFilter.class);
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private final static long EXPIRE_TIME = Constants.TOKEN_EXPIRE * 60;
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// 排除过滤的 uri 地址，nacos自行添加
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@Autowired
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private IgnoreWhiteProperties ignoreWhite;
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@Resource(name = "stringRedisTemplate")
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private ValueOperations<String, String> sops;
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@Autowired
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private RedisService redisService;
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@Override
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public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain)
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{
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String url = exchange.getRequest().getURI().getPath();
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// 跳过不需要验证的路径
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if (StringUtils.matches(url, ignoreWhite.getWhites()))
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{
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return chain.filter(exchange);
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}
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String token = getToken(exchange.getRequest());
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if (StringUtils.isBlank(token))
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{
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return setUnauthorizedResponse(exchange, "令牌不能为空");
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}
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String userStr = sops.get(getTokenKey(token));
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if (StringUtils.isNull(userStr))
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{
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return setUnauthorizedResponse(exchange, "登录状态已过期");
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}
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JSONObject obj = JSONObject.parseObject(userStr);
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String userid = obj.getString("userid");
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String username = urlEncode(obj.getString("username"));
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if (StringUtils.isBlank(userid) || StringUtils.isBlank(username))
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{
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return setUnauthorizedResponse(exchange, "令牌验证失败");
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}
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// 设置过期时间
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redisService.expire(getTokenKey(token), EXPIRE_TIME);
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// 设置用户信息到请求
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ServerHttpRequest mutableReq = exchange.getRequest().mutate().header(CacheConstants.DETAILS_USER_ID, userid)
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.header(CacheConstants.DETAILS_USERNAME, username).build();
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ServerWebExchange mutableExchange = exchange.mutate().request(mutableReq).build();
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return chain.filter(mutableExchange);
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}
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private Mono<Void> setUnauthorizedResponse(ServerWebExchange exchange, String msg)
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{
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ServerHttpResponse response = exchange.getResponse();
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response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
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response.setStatusCode(HttpStatus.OK);
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log.error("[鉴权异常处理]请求路径:{}", exchange.getRequest().getPath());
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return response.writeWith(Mono.fromSupplier(() -> {
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DataBufferFactory bufferFactory = response.bufferFactory();
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return bufferFactory.wrap(JSON.toJSONBytes(R.fail(msg)));
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}));
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}
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private String getTokenKey(String token)
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{
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return CacheConstants.LOGIN_TOKEN_KEY + token;
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}
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/**
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* 编码
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*/
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private String urlEncode(String value) {
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try {
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value = URLEncoder.encode(value, "UTF-8");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return value;
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}
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/**
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* 获取请求token
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*/
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private String getToken(ServerHttpRequest request)
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{
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String token = request.getHeaders().getFirst(CacheConstants.HEADER);
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if (StringUtils.isNotEmpty(token) && token.startsWith(CacheConstants.TOKEN_PREFIX))
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{
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token = token.replace(CacheConstants.TOKEN_PREFIX, "");
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}
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return token;
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}
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@Override
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public int getOrder()
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{
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return -200;
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}
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}
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